For which one of the following tumors, Gastrin is a biochemical marker -
High-Yield Explanation
Gastrin is secreted by Gastrinomas.
Gastrinomas are neuroendocrine tumors found in
Duodenum (50 to 70%)
Pancreas (20 to 40%) and
Other intraabdominal sites (mesentry, lymph nodes, biliary tract, liver; stomach, ovary).